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Heterogeneous Catalysis01:22

Heterogeneous Catalysis

Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...
Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate02:21

Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate

Alkenes can be dihydroxylated using potassium permanganate. The method encompasses the reaction of an alkene with a cold, dilute solution of potassium permanganate under basic conditions to form a cis-diol along with a brown precipitate of manganese dioxide.
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide02:44

Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide

Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.

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Updated: May 13, 2026

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
08:40

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Published on: December 6, 2021

订购的半孔氧化物作为高效的氧气进化催化剂.

Jonathan Rosen1, Gregory S Hutchings, Feng Jiao

  • 1Center for Catalytic Science & Technology, Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, Delaware 19716, USA.

Journal of the American Chemical Society
|March 2, 2013
PubMed
概括
此摘要是机器生成的。

开发地球上丰富的太阳能燃料催化剂是关键. 这项研究创造了一种具有很大的表面积的高度多孔的氧化物催化剂,显著提高了氧气进化活动,以有效地生产太阳能燃料.

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Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
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Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

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Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts
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Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts

Published on: August 7, 2018

相关实验视频

Last Updated: May 13, 2026

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
08:40

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Published on: December 6, 2021

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
10:57

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Published on: April 10, 2018

Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts
05:47

Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts

Published on: August 7, 2018

科学领域:

  • 催化剂是一种催化剂.
  • 材料科学 材料科学 材料科学
  • 可再生能源可再生能源是可再生能源.

背景情况:

  • 有效的氧气进化催化剂对于太阳能燃料生产至关重要.
  • 对于大规模生产而言,人们正在寻求地球上丰富的元素基催化剂.

研究的目的:

  • 制造具有超高表面积的中孔性氧化物催化剂.
  • 使用地球上丰富的元素来增强氧气进化活动.

主要方法:

  • 在半孔性Co3O4旋转中进行Mg的替代.
  • 用Mg选择性浸出,以产生多孔性和缺陷.
  • 在可见光和化学系统中测试氧气演变.

主要成果:

  • 实现了超高的表面积 (高达250 m2/g).
  • 创建了一个高度多孔的氧化物与旋转缺陷.
  • 证明了高氧化演化活性,TOF为~2.2 × 10−3 s−1在酸中的每一个Co原子.

结论:

  • 这种新型的中孔性氧化物催化剂的性能明显优于传统的催化剂.
  • 这种材料对高效的太阳能燃料生产有很大的前景.
  • 在多孔氧化物中进行缺陷工程是催化的一个可行的策略.